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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. You are designing an n-tier Java EE application. You have already decided that some of your JSPs will need to get data from a Customer entity bean. You are trying to decide
whether to use a Customer stub object or a Transfer Object. Which two statements are true? (Choose two.)

A) Only the Transfer Object will need to use a Business Delegate.
B) The Transfer Object will decrease data staleness.
C) Using the stub approach allows you to design the application without using a Service Locator.
D) The stub will increase network traffic.
E) In both cases, the JSPs can use EL expressions to get data.
F) The stub will increase the logic necessary in the JSPs.

2. Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:
20.
String key = "com.example.data";
21.
session.setAttribute(key, "Hello");
22.
Object value = session.getAttribute(key);
23.
Assume session is an HttpSession, and is not referenced anywhere else in ServletA.
Which two changes, taken together, ensure that value is equal to "Hello" on line 23? (Choose two.)

A) enclose lines 21-22 in a synchronized block:
synchronized(this) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
B) ensure that the ServletB.service method is synchronized
C) enclose lines 21-22 in a synchronized block:
synchronized(session) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
D) ensure that ServletB synchronizes on the session object when setting session attributes
E) ensure that the ServletA.service method is synchronized

3. Which activity supports the data integrity requirements of an application?

A) using HTTPS as a protocol
B) using forms-based authentication
C) using an LDAP security realm
D) using HTTP Basic authentication

4. You need to create a JavaBean object that is used only within the current JSP page. It must NOT be accessible to any other page including those that this page might import. Which JSP standard action can accomplish this goal?

A) <jsp:useBean name='pageBean' class='com.example.MyBean' />
B) <jsp:makeBean name='pageBean' class='com.example.MyBean' />
C) <jsp:useBean id='pageBean' type='com.example.MyBean' />
D) <jsp:makeBean id='pageBean' class='com.example.MyBean' />
E) <jsp:useBean id='pageBean' class='com.example.MyBean' />
F) <jsp:makeBean id='pageBean' type='com.example.MyBean' />

5. Your company has a corporate policy that prohibits storing a customer's credit card number in any corporate database. However, users have complained that they do NOT want to reenter their credit card number for each transaction. Your management has decided to use client-side cookies to record the user's credit card number for 120 days. Furthermore, they also want to protect this information during transit from the web browser to the web container; so the cookie must only be transmitted over HTTPS.
Which code snippet creates the "creditCard" cookie and adds it to the out going response to be stored on the user's web browser?

A) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setSecure(true);
12.
c.setMaxAge(10368000);
13.
response.addCookie(c);
B) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setSecure(true);
12.
c.setAge(10368000);
13.
response.setCookie(c);
C) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setSecure(true);
12.
c.setAge(10368000);
13.
response.addCookie(c);
D) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setHttps(true);
12.
c.setMaxAge(10368000);
13.
response.setCookie(c);
E) 10. Cookie c = new Cookie("creditCard", usersCard);
11.
c.setHttps(true);
12.
c.setAge(10368000);
13.
response.addCookie(c);